2004
DOI: 10.1090/s0894-0347-04-00463-1
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Real bounds, ergodicity and negative Schwarzian for multimodal maps

Abstract: We consider smooth multimodal maps which have finitely many non-flat critical points. We prove the existence of real bounds. From this we obtain a new proof for the non-existence of wandering intervals, derive extremely useful improved Koebe principles, show that high iterates have ‘negative Schwarzian derivative’ and give results on ergodic properties of the map. One of the main complications in the proofs is that we allow f f to have inflection points.

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Cited by 90 publications
(63 citation statements)
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“…Historically, the Koebe Principle was proven under the assumption that T has negative Schwarzian derivative, see [30,Chapter III.6]. A recent work of Kozlovski [23], extended to the multimodal case by van Strien and Vargas [42], shows that the C 2 assumption suffices. The magnitude of K = K(δ) = K 0 ((1 + δ)/δ) 2 , where K 0 depends only on the map.…”
Section: Statistics Of Return Times For Non-hyperbolic Interval Mapsmentioning
confidence: 99%
“…Historically, the Koebe Principle was proven under the assumption that T has negative Schwarzian derivative, see [30,Chapter III.6]. A recent work of Kozlovski [23], extended to the multimodal case by van Strien and Vargas [42], shows that the C 2 assumption suffices. The magnitude of K = K(δ) = K 0 ((1 + δ)/δ) 2 , where K 0 depends only on the map.…”
Section: Statistics Of Return Times For Non-hyperbolic Interval Mapsmentioning
confidence: 99%
“…The first results in this direction were obtained for circle diffeomorphisms in the 1920's by Denjoy [10], for critical circle maps in [66] and for circle maps with plateaus in [40]. For interval maps there are results, in increasing generality, [4,18,34,41,46,50,59]. On the other hand, interval exchange transformations can have wandering intervals, see e.g.…”
Section: Informal Summary Of the The Results In This Papermentioning
confidence: 99%
“…A feasible candidate for g may be the map from [13,Theorem 7], whose wild attractor, similarly to C, is semiconjugate to the dyadic adding machine. Note that here things are further complicated by the fact that wild attractors have zero measure [39]. In the second case the situation should be simpler: we just need a map h possessing a wild attractor which is also an adding machine for h. In this regard [11] may be helpful.…”
Section: Introduction and Main Resultsmentioning
confidence: 99%